Boat Power Sources

After reading the yacht-owner's bible (Nigel Calder's 'Boatowner's Mechanical and Electrical Manual', published by Adlard Coles Nautical) we had a serious rethink about our power sources. Eventually we will be looking to install solar panels but in the short term we had to make an educated guess at what our daily power consumption would be and put that within the context of buying new batteries and battery charger.